ECHINODERMATA. 671 



Genera having Three Basals, no Subradials, no Regular INTER- 

 RADIALS. THE FAMILIES ARE ANOMALOUS AND HAVE NO NEAR AF- 

 FINITY WITH EACH OTHER. 



Family Calceocrinid^;. — Calceocrinus, Deltacrinus, Halysiocrinus. 

 Family Synbathocrinidje. — Synbathocrinus. 

 Family Zophocrinid^e. — Zophocrinus. 



Genera having Four Basals, no Subradials, Regular Interradials. 



Family Eucalyptocrinid^e. — Callicrinus, Eucalyptocrinus, Hypanthocrinus. 

 Family Melocrinid^:. — Compsocrinus, Mariacrinus, Melocrinus, Technocrinus. 

 Family Xenocrinid^e. — Xenocrinus. 



Genera having Five Basals, Five Subradials, no Regular Inter- 

 radials. 



Famil y Ag assizocrinid^e. — Agassizocrinus. 



Family Cyathocrinidje. — Abrotocrinus, Arachnocrinus, Bursacrinus, Cara- 



bocrinus, Cyathocrinus, Graphiocrinus, Palseocrinus. 

 Family Dendrocrlnilve. — Dendrocrinus, Ottawacrinus. 

 Family Erisocrinidve. — Erisocrinus, Menocrinus, Ste'mmatocrinus. 

 Family Eupachycrinid^e. — iEsiocrinus, Delocrinus, Eupachycrinus, Ulocrinus. 

 Family Merocrinid.e. — Merocrinus. 

 Family Poteriocrinid^:. — Atelestocrinus, Barycrinus, Coeliocrinus, Euspiroc- 



rinus, Goniocrinus, Homocrinus, Hydreionocrinus, Poteriocrinus, Scaphioc- 



rinus, Vasocrinus, Zeacrinus. 



Genera having Five Basals, Five Subradials, Regular Inter- 

 radials. 



Family Glyptasterld^e. — Cyphocrinus, Glyp taster, Lampterocrinus, Thy- 



sanocrinus. 

 Family Gaurocrinid^e. — Gaurocrinus, Retiocrinus. 

 Family Rhodocrinid,e. — Archseocrinus, Goniasteroidocrinus, Lyriocrinus, 



Rhaphanocrinus, Rhodocrinus. 



Genera having Five Basals, no Subradials, Regular Interradials. 



Family Clek>crinid.e. — Cleiocrinus. 



Family Glyptocrinid^e. — Cupulocrinus, Glyptocrinus, Pycnocrinus, Schizoc- 

 rinus, Siphonocrinus. 



Genera having Five Basals, no Subradials, no Regular Inter- 

 radials. 



Family Anomalocrinid,e. — Anomalocrinus. 



Family Belemnocrinid.e. — Belemnocrinus. 



Family Catillocrinhle. — Catillocrinus. * 



Family Gazacrinid.e. — Gazacrinus. 



Family Haplocrimd^:. — AUagecrinus, Haplocrinus. 



